_onCreateOwnedWeapon ignores provided proficiency value

[aaclayton]

Originally in GitLab by @akrigline

When programattically creating a weapon item on a Character actor, the provided proficiency value is ignored by _onCreateOwnedWeapon if the item has a weaponType that the actor does not typically have proficiency with.

Example:

someActor.createEmbeddedDocuments("Item", [{
      "name": "Summoned Spiritual Weapon",
      "type": "weapon",
      "data": {
        "weaponType": "simpleM",
        "proficient": true
      }
    }]
  );

If proficient is provided, we should use the value provided instead of overriding it.

[aaclayton]

Originally in GitLab by @Fyorl

mentioned in commit 9fad980